Stopping attachment for talking-machines.



H. HUBBELL.

STOPPING ATTACHMENT FOR TALKING MACHINES.

APPLICATION man JUNE 21. 1916.

1%68, 121 I Patented June 4, 1918.

1 III 70,,

WITNESS INVENTOR 1 A "I Q A TTOR/VE V HARVEY H'U'IBBETJL, QF BEIDGEPOBT,CONNECTICUT.

STOPPLENG ATTACHMENT FOR TALKING-MACHINES.

Specification of Letters Patent.

Patented June a, T918.

a lication filed June 21, me. s mi to. 106,188. 7

To all whom it may concern:

Be it known that I, HARVEY HUBBELL, a citizen of the United States,residing at Bridgeport, county of Fairfield, State of Connecticut, haveinvented an Improvement in Stopping Attachments for Talking-Machines, ofwhich the following 1s a speclfication.

This invention has for its ob ect to pro vide a simple and inexpensivestopping attachment adapted to be secured to the top of the case of anytalking machine, which may be set to stop the rotation of the turntableat the end of a record or after a half or any other portion of a recordhas been played by the movement of the tone arm and without appreciableresistance to the tone arm.

With this end in view I have devised the novel attachment which I willnow describe, referring to the accompanying drawing forming a part ofthis specification an using reference characters to intimate the severalparts;

Figure 1 is a plan view of a talking machine with my novel attachment inplace thereon, the tone arm and sound box being out of operativeposition;

Fig. 2 a similar view showing the manner in which the tone armcooperates with the stopping attachment in setting the latter;

Fig. 3 a plan view of the attachment on i an enlarged scale;

Fig. 4 a section on the line 4-4 in Fig. 3, looking in the direction ofthe arrows;

Fig. 5 a section on the line 5-5 in Fig. 3, looking in the direction ofthe arrows, and

Fig. 6 is a section on the lme 6-6 1n Fig. 3, looking in the directlonof the arrows.

10 denotes the case of a talking machine, 11 the turntable, 12 a recordthereon, 13 the tone arm, which swings in the hor zontal plane, and 14the sound box, whlch 1s p1voted to the free end of the tone arm to swingin the vertical plane. These parts may be of any ordinary or preferredconstruction, my

present attachment being equally adapted to all machines using aswinging tone arm.

My novel attachment comprises essentially a plate 15, a brake lever 16,a brake shoe 17, an operating member 18 and a stopping arm 19. T e plateis provided with holes to receive screws by which it is attached to thecase and with upturned lugs 20 -which are set in'close relation to theedge of the turntable and act as guides to prop-' erly aline the platein attaching it in lace. The brake shoe is provided with a frictionfacing 21 adapted to bear against the edge of the turntable and ispivoted to one arm of the brake lever. This lever is in general form abell crank lever, one arm being longer than the other and the brake shoebeing pivoted to the outer end of the long arm. The short arm of thislever is pivoted to swin on a pin 22 extending upward from the p late. Ihave shown the brake lever as blanked out and formed from sheet metaland the short arm as made U-shaped in order to give a double bearing onthe pin and insure steadiness of movements The operating member islikewise blanked out and formed from sheet metal, is made substantiallyU-shaped, and is adapted to oscillate on a pin 23 extending upward fromthe plate. The operating member is provided with an arm 24: having nearits end a slot 25 which is engaged by a pin 26 extending u ward from thebrake lever. Oscillation o the operating member will cause the brakeshoeto be swung toward or from the edge of the turntable. As seen in thedraw-- ing, the turntable rotates from left to right. It is important tonote that neither the tone arm nor the action of a spring is dependedupon to stop the rotation of the turntable. The tone arm simply placesthe brake shoe in engagement with the turntable. The instantthis'engagement takes place the turntable itself causes the brake shoeto produce a wedging action. This is owing to the fact that the pivotalpoints of the operating member and of the brake shoe to the operatinglever are on opposite sides of the general longitudinal line of theshort arm of the lever, which if extended would intersect, orapproximately intersect, the pivotal points of the operating lever andthe turntable. The instant the brake shoe is caused to engage the edgeof the turntable, the friction of the turntable on the brake shoe willcarry the latter in the direction in which the wedging action whichimmediately stops the .rotation of the turntable. In other words, theaction of the operating member upon the brake lever is not depended uponto stop the rotation of the turntable, the function of the operatinmember being s1mply to oscillate the brake lever sufiiciently to placethe brake shoe in en a ement with. the turn-- table, after which it 1sthe action of the turntable on the brake shoe in car 1n t forward in thedirection in who t e turntable is rotating that stops the rotation oftional engagement between the stopping arm and the operating member isprovided to cause the stopping arm, when engaged by the tone arm, tooscillate the operating member, said member in turn swinging the brakelever and causing en agement of the brake shoe with the turnta le. Theouter end of the stopping arm is suitably shaped to adapt it forengagement by; the tone arm. In the present instance I ave shown theouter end of the tone arm as reduced in width and bent to form a coil.It should be understood, however, that the special design orconfiguration of the several members is' wholly immaterial so far as theprinciple of the invention is concerned.

The operation is as follows: Fig. 1 shows the normal or inoperativeposition of the parts with a record upon the turntable ready to beplayed. To set the stopping attachment the operator swings the sound boxover mto operative position and then swings the tone arm inward, as in.Fig. 2, until the needle will register with'the groove in the recordnear its inner end, if it is desired to lay the entire record, or withthe mid llmgth or any other portion of the groove if 'it is not desiredto play the entire record.

As the tone arm is swung inward, it picks up the stopping arm of theattachment and car-,-

ries it with it as far inward as the tone arm is moved. The operatorthen swings 'the tone arm away from the stopping arm, leavin the latterset. The tone arm is then set wit the needle near the outer end of thegroove in the record in the usual manner. The tone arm as it swingsinward in playing the recor moves toward the stopping arm, picks up thelatter and carries it forward with it. The degree of frictionalengagement of the stopping arm with the operating member is of coursedetermined by comprisin adjustment of the wing nut. It must be suf- 1. Astoppingattachment for talking ma- 1 chines having a turntable and atone arm, a bell crank brake lever having long and s ort arms and ivotedto swing on its short arm, a brakes oe pivoted to the free end of saldlever and adapted to contact with the turntable, an pperating memberhaving pivotal connection with the brake lever, and a stopping armhaving frictional connection with the operating member and a ,head inthe path of movement of the tone arm, the pivotal points of the ocrating member and of the brake shoe to t e brake lever lying onopposite sides of a line longitudinal to the s ort arm of said lever,substantially as described, for the purpose set forth,

2. An attachment of the character described, comprisin a bell crankbrake lever having long and s ort arms and pivoted to swing on its shortarm, a concave brake shoe pivoted to the long arm of said lever, and

an operatin member having pivotal connection 'wlth said lever, thepivotal points of the operating member and of the brake shoe to thebrake lever lying on opposite sides of a line longitudinal to the shortarm of said lever, so that actuation of the operating member will causethe brake shoe to engage the edge of a turntable after which theturntable will carry the shoe forward and produce a wedgin action.

3. An attac ment of the character de-.

scribed, comprisin a bell crank brake lever having long and s ort armsand pivoted to swing on its short arm, a brake shoe pivoted to the longarm ofsaid lever, an operating member having pivotal connection with thea brake lever, the ivotal points of theoperating member. and of thebrake shoe to the brake lever lying on opposite sides of a linelongitudinal to the short arm of said lever, and a stopping arm adaptedto be engaged by a tone arm and to be moved independently of theoperating member, but normally oscillating said member by frictionalengagement.

be engaged by a tone arm.

member and of the brake shoe to the brake lever lying on opposite sidesof a linelongitudinal to the pivoted arm of said lever.

5. An attachment of the character described, comprising a bell crankbrake lever pivoted to swing on one arm, a brake shoe pivoted to theother arm and adapted to contact with a turntable, an operating memberhaving pivotal connection with the brake lever, the pivotal points ofthe operating member and of the brake shoe to the brake lever lying onopposite sides of a line longitudinal to the pivoted arm of said lever,and a stopping arm having frictional connection with the operatingmember and adapted to 6. An attachment of the character described,comprising a bell crank brake lever pivoted to swing on one arm, anelongated concave brake shoe pivoted to the other arm and an operatingmember having pivotal connection with the brake lever, the pivotalpoints of the operating member and of the brake shoe to the brake leverlying on oppositesides of a line longitudinal to the pivoted arm of saidlever.

7 An attachment of the character described, comprising a bell crankbrake lever pivoted to swing on one arm, an elongated concave brake shoepivoted to the other arm, an operating member having pivotal connectionwith the brake lever, the pivotal points of the operating member and ofthe brake shoe to the brake lever lying on opposite sides of a linelongitudinal to the pivoted arm of said lever, and a stopping arm havingfrictional connection with the op-' erating member, and a head in thepath of movement of the tone arm, whereby the brake shoe is caused toengage a turntable and continued movement of the turntable will carrythe shoe forward and stop rotation of the turntable by a wedging action.

In testimony whereof I aflix my signature.

HARVEY HUBBELL.

